Mitochondrial trifunctional protein

Mitochondrial trifunctional protein (MTP) is a protein attached to the inner mitochondrial membrane which catalyzes three out of the four steps in beta oxidation. MTP is a hetero-octamer composed of four alpha and four beta subunits:

Not to be confused with microsomal triglyceride transfer protein.

The three functions are 2-enoyl coenzyme A (CoA) hydratase, long-chain 3-hydroxy acyl-coenzyme A dehydrogenase and long-chain 3-ketoacyl CoA thiolase.

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